Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 473, Issue 1-2, Pages 249-253Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.05.093
Keywords
maraging steel; alloying; austenite retention; grain boundary; precipitation
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An Fe-10Ni-5Mn (wt.%) maraging steel was further alloyed with higher amounts of molybdenum, titanium, chromium and tungsten additions. Optical, scanning and transmission electron microscopy, X-ray diffraction and tensile test were used to study effect of the further alloying on the microstructure and mechanical properties of the present steel. Austenite retention was found as a consequence of further alloying. The retained austenite showed mechanical instability and transformed to martensite during tensile deformation, giving rise to high uniform tensile elongation. Precipitation of a molybdenum-enriched second phase particle was identified at austenite grain boundaries presumably due to excess alloying elements content. (C) 2007 Elsevier B.V. All rights reserved.
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